Every spring the Amazon dolphins get to leave the confines of their river channel for a taste of their former habitat.

每年春天，亚马逊河豚离开所属河道的范围，到从前的栖地去晃一晃。

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Because the water pressure in spring assembly and valve body makes the conical compression core and seat seal automatically, the flow channel of valve is closed.

因弹簧总成和阀体中水流压力将锥形压芯和锥形压座自动压合密封，阀体水流通道关闭。

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The vent valve comprises an air vent screw, a spring and a valve ball which leans against the channel under the acting force of the spring.

所述排气阀包括一排气螺钉、 一弹簧、一钢球，阀球在弹簧作用力下抵靠通道上。

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On March 1, Dadullah told Britain's Channel Four that his forces were poised for a spring offensive against NATO-led coalition troops in Afghanistan, and that he was maintaining a regular line of communication with bin Laden.

CNN: Taliban: Bin Laden plans Iraq strikes

The show debuted in spring 2001 and quickly became a hit, consistently ranking in the top three of the channel's most-watched shows.

FORBES: Law & Order, Animal Edition